[PATCH 3/3] nbd: use the atomic queue limits API in nbd_set_size

[Christoph Hellwig <hch@xxxxxx>]

Use queue_limits_start_update / queue_limits_commit_update to update
all the limits in one go and with proper sanity checking.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 drivers/block/nbd.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 22ee0ed9aa6db0..9d4ec9273bf954 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -319,6 +319,9 @@ static void nbd_mark_nsock_dead(struct nbd_device *nbd, struct nbd_sock *nsock,
 static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
 		loff_t blksize)
 {
+	struct queue_limits lim;
+	int error;
+
 	if (!blksize)
 		blksize = 1u << NBD_DEF_BLKSIZE_BITS;
 
@@ -334,12 +337,16 @@ static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize,
 	if (!nbd->pid)
 		return 0;
 
+	lim = queue_limits_start_update(nbd->disk->queue);
 	if (nbd->config->flags & NBD_FLAG_SEND_TRIM)
-		blk_queue_max_discard_sectors(nbd->disk->queue, UINT_MAX);
+		lim.max_hw_discard_sectors = UINT_MAX;
 	else
-		blk_queue_max_discard_sectors(nbd->disk->queue, 0);
-	blk_queue_logical_block_size(nbd->disk->queue, blksize);
-	blk_queue_physical_block_size(nbd->disk->queue, blksize);
+		lim.max_hw_discard_sectors = 0;
+	lim.logical_block_size = blksize;
+	lim.physical_block_size = blksize;
+	error = queue_limits_commit_update(nbd->disk->queue, &lim);
+	if (error)
+		return error;
 
 	if (max_part)
 		set_bit(GD_NEED_PART_SCAN, &nbd->disk->state);
-- 
2.39.2